Which of the following is a common sign of infection?

Redness, swelling, warmth, pain, and fever are hallmark signs of infection. When the body detects the presence of pathogens such as bacteria, viruses, or fungi, it initiates an inflammatory response. This response manifests as increased blood flow to the affected area, leading to redness and warmth. Swelling occurs due to the accumulation of fluid and immune cells, and pain is a result of tissue damage and the release of inflammatory chemicals. Fever, a systemic response, indicates that the body is fighting off the infection, helping to create an environment less favorable for the pathogens. These combined signs are critical for healthcare providers to recognize potential infections and to initiate appropriate treatment promptly.